Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Effective income tax rate	13.50%	21.50%
Total gross liability for unrecognized tax benefits	$ 46.7		$ 46.3